package com.ruoyi.framework.web.exception;

import javax.servlet.http.HttpServletRequest;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import org.apache.shiro.authz.AuthorizationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.converter.HttpMessageConversionException;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.validation.BindException;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.ModelAndView;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.exception.BusinessException;
import com.ruoyi.common.exception.DemoModeException;
import com.ruoyi.common.utils.ServletUtils;
import com.ruoyi.common.utils.security.PermissionUtils;

import java.util.*;
import java.util.stream.Collectors;

/**
 * 全局异常处理器
 *
 * @author ruoyi
 */
@RestControllerAdvice
public class GlobalExceptionHandler {
    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 权限校验失败 如果请求为ajax返回json，普通请求跳转页面
     */
    @ExceptionHandler(AuthorizationException.class)
    public Object handleAuthorizationException(HttpServletRequest request, AuthorizationException e) {
        log.error(e.getMessage(), e);
        if (ServletUtils.isAjaxRequest(request)) {
            return AjaxResult.error(PermissionUtils.getMsg(e.getMessage()));
        } else {
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.setViewName("error/unauth");
            return modelAndView;
        }
    }

    /**
     * 请求方式不支持
     */
    @ExceptionHandler({HttpRequestMethodNotSupportedException.class})
    public AjaxResult handleException(HttpRequestMethodNotSupportedException e) {
        log.error(e.getMessage(), e);
        return AjaxResult.error("不支持' " + e.getMethod() + "'请求");
    }

    /**
     * 拦截未知的运行时异常
     */
    @ExceptionHandler(RuntimeException.class)
    public AjaxResult notFount(RuntimeException e) {
        log.error("运行时异常:", e);
//        return AjaxResult.error("运行时异常:" + e.getMessage());
        return AjaxResult.result_XY("500");
    }

    /**
     * 系统异常
     */
    @ExceptionHandler(Exception.class)
    public AjaxResult handleException(Exception e) {
        log.error(e.getMessage(), e);
        return AjaxResult.error("服务器错误，请联系管理员");
    }

    /**
     * 业务异常
     */
    @ExceptionHandler(BusinessException.class)
    public Object businessException(HttpServletRequest request, BusinessException e) {
        log.error(e.getMessage(), e);
        if (ServletUtils.isAjaxRequest(request)) {
            return AjaxResult.error(e.getMessage());
        } else {
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.addObject("errorMessage", e.getMessage());
            modelAndView.setViewName("error/business");
            return modelAndView;
        }
    }

    /**
     * 方法数据转换异常
     *
     * @return
     * @author XiaoYi...
     * @date 2020/7/31 9:28
     */
    @ExceptionHandler(HttpMessageNotReadableException.class)
    public AjaxResult headerJsonException(HttpMessageConversionException e) {
        log.error("请求参数转换异常[{}][{}]","", e.getMessage());
        return AjaxResult.result_XY("200122");
    }

    /**
     * 方法参数无效异常
     *
     * @return
     * @author XiaoYi...
     * @date 2020/7/31 9:28
     */
    @ExceptionHandler(value = MethodArgumentNotValidException.class)
    // 设置响应状态码为400
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    public AjaxResult handleBindGetException(MethodArgumentNotValidException ex) {
        Map<String, Object> body = new LinkedHashMap<String, Object>();
        body.put("timestamp", new Date());
        // 获取所有异常
        List<String> errors = ex.getBindingResult()
                .getFieldErrors()
                .stream()
                .map(x -> x.getDefaultMessage())
                .collect(Collectors.toList());
        body.put("errors", errors);
        log.error(errors + "[{}]", String.valueOf(body));
        return AjaxResult.result_XY("2001", body);
    }


    @ExceptionHandler
    @ResponseBody
    public AjaxResult handle(ConstraintViolationException exception) {
        log.error(String.valueOf(exception));
        Set<ConstraintViolation<?>> violations = exception.getConstraintViolations();
//        JSONArray jsonArray = new JSONArray();
        JSONObject resultObj = new JSONObject();

        for (ConstraintViolation violation : violations) {
            resultObj.put("errmsg", violation.getMessage());
            resultObj.put("errValue", violation.getInvalidValue());
//            jsonArray.add(resultObj);
            break;
        }
        return AjaxResult.result_XY("200122", resultObj);
    }


    /**
     * 自定义验证异常
     */
    @ExceptionHandler(BindException.class)
    public AjaxResult validatedBindException(BindException e) {
        log.error(e.getMessage(), e);
        System.out.println("异常：" + e.getMessage());
        String message = e.getAllErrors().get(0).getDefaultMessage();
        return AjaxResult.error(message);
    }

    /**
     * 演示模式异常
     */
    @ExceptionHandler(DemoModeException.class)
    public AjaxResult demoModeException(DemoModeException e) {
        return AjaxResult.error("演示模式，不允许操作");
    }
}
